Surge-Proof Combination Air Valve for Pump Stations and Long Pipelines

Home > Category > Air Release Valve  > Surge-Proof Combination Air Valve for Pump Stations and Long Pipelines

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Contact us

RKSfluid Flow Control Company

Web: www.rksfluid.com
Tel:  +86 24 2318 0188
Fax: +86 24 2318 0788
Mail: info@rksfluid.com

Surge-Proof Combination Air Valve for Pump Stations and Long Pipelines

  • Type: Air Release valve
  • Size: DN 50 - DN400 (1" Male screw)
  • Pressure ratings: PN10,PN16,PN25,PN40,Class125,Class150
  • Body: Ductile iron, Stainless steel
  • Temperature Range: 0-70 ºC
  • Medium: Water
  • Connection: Threaded, Flange
  • Product Details

KEY FEATURES & BENEFITS

  • Golden ratio designed body and cover to generate fantastic outline
  • Aerodynamic air flow path inside, Efficient release of air pockets from pressurized pipe lines.
  • Stainless steel with fully corrosion resistant parts, maximum PN40 bar rated, provided with internal ribs for accurate guiding of the float.
  • Tangential drainage to ensure fully drain, sideway with female threaded for retrofitting drainage pipeline or check valve
  • Compact, simple and reliable structure: Lower maintenance and increased life span.
  • Nozzle can be different port size to fit for demands of different pressure grades
  • Dynamic sealing: Prevents leakage under low pressure conditions (1.5 psi; 0.1 bar).
  • Approved quality control process: Performance and specification tested and measured with specialized test facility.

NO Part Name Material Remark NO Part Name Material
1 Body DI   11 Top float PP
2 Screw A2   12 Seal ring FKM/NBR
3 Plate Ring SS304   13 Top flange SS304
4 Lower float PP   14 Screen SS304
5 Seal EPDM   15 Cap SS304
6 Seal retainer SS304   16 Screw A2
7 Screw A2   17 Bolt A2
8 Middle float PP or 4F3F only 18 Nut A2
9 Nozzle SS304   19 Washer A2
10 Oring NBR or 4F3F only 20 Bolt A2

FAQs

A combination air release valve is designed to automatically release trapped air and admit large volumes of air in water pipeline systems. It helps improve flow efficiency, prevent vacuum conditions, and reduce the risk of pipeline surge or water hammer.
Combination air valves are typically installed at pipeline high points, long horizontal sections, pump discharge lines, and areas where air accumulation or vacuum conditions may occur. Proper installation improves pipeline safety and operational stability.
A surge-proof air valve controls air discharge during pipeline filling and operation, helping reduce sudden pressure surges caused by rapid air evacuation. This design is especially suitable for pump stations, rising mains, and long-distance transmission pipelines.
Full bore air valves provide higher airflow capacity for rapid pipeline filling and draining. Reduced bore designs offer more controlled airflow and are commonly used where surge protection and stable air discharge are required.
This air valve is widely used in: Water transmission pipelines, Municipal water networks, Irrigation systems, Pump stations, Industrial water systems etc. It is especially suitable for pipelines with elevation changes or long-distance transmission conditions.
Available materials include: Ductile Iron, Stainless Steel CF8 / CF8M, Duplex Stainless Steel 2205 Different material options are suitable for standard water, corrosive environments, seawater, and high-chloride applications.
The valve is available for pressure ratings up to PN40 and can be supplied with different flange standards including: EN1092-2 PN10 / PN16 / PN25 / PN40 ANSI Class 125 / 150 / 250 Customized configurations are available upon request.
Yes. Customized flange drilling, coating systems, material selection, nozzle configuration, and pressure ratings can be supplied according to project specifications and pipeline operating conditions.
RKSfluid Flow Control Co., Ltd.

Tel:+86 151 4027 2439

Contact Person:Damon

Damon
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